Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"rang hoc mon snippets" » "nang hoc mon snippets", "bang hoc mon snippets", "mang hoc mon snippets", "rang hoc moi snippets", "rang hoc mot snippets", "rang hoc cong snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("rang hoc mon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("rang hoc mon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( rang hoc mon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("rang hoc mon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.